Pulverized-fuel-burning locomotive



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. W. CL'ENDN PULVERIZED FUEL ABURNING LOCOMOTIVE med Aug. 15, 1925 www@ s swam-shew 1 G, W. @LENDON Punvsnzn FU my., im

EL BURNING LOGOMOTIVE ilSd Au 3 Sheets-Sheet Z5 Patented Non..v c il @27.

encuen rrjioiznnnon, or .fermi/tour, New Yoran. AssroNon 'ro INTERNATIONAL coivry ersteren nnerrrnnmne CoRronATION, A CORPORATION or DELAWARE.

PULVERZED-FUEL4BUBNING LOCOMOTVE.

.application illed August 15,1925. Serial No; 50,351.

" 'This invention relates to pulverized fuel burning locomotives.

In the burning Ot pulverized coal in locoi motive fire boxes considerable diliiculty is encountered in connection. with the honey- Acombing of the deposit over the fines,v the dues Vbeing completetyfcovered over in a comparatively short time, particularly with coal the fusing point of the ash of which is low.

@ne of the primary-objects of my invention is to overcome this difficulty.

More speciiically it is an object of the invention to provide and so arrange the eval orating' elements of the boiler ,that the rei"- use particles ,are cooled sufficiently before they strike against the flue sheet to prevent this honeycombing. v V

Stated 1n another way, l propose by my invention tor absorb heat 'from the fiume at such a rate that the :furnace temperature is kept within limits, lwherein the foregoing diiliculty is not encountered, or at least greatly minimized; this without interfering with combustion. i i

rlhe foregoing, together with such other Y Objects as may hereinafter appear,` orare y incident to my invention, are realized by means of a construction which l have illustrated in preierred form in .the accompanying drawings, wherein Fig. 1 is a longitudinal section thru the rear portion of a locomotive equipped with my improvements;

Fig. 2 is a half cross section and half end elevation to the fire box shown in Fig. l, the end elevation being broken out to illustrate certain of the fparts, and theA figure being drawn on an enlarged scale;

Fig. 3 is anenlargcd section taken on the line of Fig. 1, and V Fig. l a fragmentary section taken on the line 4-4 Oi' Fig. 1. f

Referring new to Fig. 1 and Fig. 2, the

'reference letter A indicates the lire box of the locomotive, such `tire box beingl cornposed of the outside and inside throat sheets 7 and 8; the inside side sheets 9; the inside back sheet 1 0; the crown sheet 11; the outside side sheets l2; the Outsidefback sheet 13 and the root' or cover Sheet 13a. Forwardly ot' the tire box proper is the barrel it constitutino' a continuation of the combustion space oiJ the tire box, the forward end or such combustion space being closed by the flue sheet V15 from which the fines 16 extend forwardly.

The bottom of the fire box is closed by the lire pan B, such lire pan being lined with refractory material 17.

T he powdered coal is admitted thru one or more burners 18 extending into the rear wall of the lire pan, the fuel boing directed forwardly toward the inclined front or flash l all of the fire pan, the refractory lining vot' such wall being carriedup to cover the inside throat' sheet 8. Above the-burners xs ylocated an arch l). The incoming fue] `isythus subjected to radiant heat from the nect the front water legr with the spaceA above the crown sheet, the lower portions of such legs being rounded as indicated at 23 to support the arch 24 composed of refractoiy bricks. This-arch serves to subject the fuel andflamestrea'm to' radiant heat and to turn or guide the fuel and flame' stream rearwardly. The life of the bricks of the arch is extendedby virtue of the cool-' ing effect of the Siphon water legs, thru whicha very rapid circulation takes place. Extending forwardly and upwardly from vthe inside back sheet 10 to the crownsheet 11 are a plurality of spaced tubes 25, such tubes carrying an arch 26, the upper end of' which terminates adjacent the upper end `ol' the forward arch.' The lower end ofthe `sidered together, form an inverted V-shaped arch the forward leg Ofwhich abuts against the throat sheet 8 and the rear le of which terminates short of the inside bac sheet 10.

It will be noted that the fuel and flame stream takes a substantially U shaped path in the box defined by `the fire pan,I the two arches, and the side sheets of the fire box, such portion constituting a zone of intense temperature in which thorough mixture of fuel and air occurs with -coinbustion well established and well progressed.

`-The flames passin over the rear end of the arch 26 travel orwardly passing first thru the spaces between the upper ends of.

the water tubes 25, from which the flames enter the barrel 14, 'in whichv I locate additional circulating tubes 28. The products of combustion must pass thru the space be- -'tween'such tubes on their way to the fiues 16.

Itis to be noted that the tubes 25 extend'between the siphon water legs 22. It will be seen that the upper ends of the tubes 25, the upper portions ofthe water legs 22and the tubes 28l constitute a large addition to the evaporating surface of the fire box and such -portions absorb a large quantit `of heat so that by the time the'products o combustion reach the flue 16 their temperature will be sufiiciently low to prevent they refuse partcles carried in suspension therein from coopenings 29. A i

It will be seen that the two arches consti-. tute a barrier between the, additional evapoalescing together` upon the, flue sheet and eventually covering over the iues. This deposlt remains in a readily removable form and is taken out thru one or more discharge rating surface just described and the zone of intense temperature previously mentioned,

' "of heatgabsorbed in the vfire box lnearest the .source of theA greatest heat. Furthermore,

the contents of the boiler is turned Aovei.` '"mucli'inore rapidly, which also tends toward `nem'aa'sed capacity and also efficiency. A"('Jtlierobjects will occurV to those skilled infthe art.

What I claim is:

'-1. In a pulverized coal burning loomo' signedjmy name. vinto said box-ina forward direction adjacent ,the bottomithereof, an inverted ,V-shaped tive,-a fire box, means for delivering fuel arch in said box the rear leg of which tei'- minates short of the rear wall of said'box,

van outlet above and forward of said arch, together with longitudinal channels largely defined by evaporative surfaces above said arch to substantially cool the fuel and `fia`ine stream before it reaches said outlet..

2. In a pulvcrized coal burning locomotive, a fire box, means for delivering fuel into said box in a forward direction adjacent the bottoni thereof, an inverted V-shaped arch in said box the rear leg of which termiiiates short of thc rear wall of saidbox, an outlet abc-:e and forward of said arch, longitudinal channels largely defined, by evaporative surfaces above said arch, together with additional evaporative surfaces comprising tubes beyond said arch but rearward'of Said outlet.

3. In a pulverized coal burning locomotive, a fire box, means for delivering fuel into said box in a forward direction adjacent the bottom thereof, an inverted V shaped arch in said box the rear `leg of which terminates short of the rear and sides of said box, together with longitudinal channels largely defined by evaporative surfaces above said arch to suhstantially'cool the products of combustionl before they reaeli the outlet.v

`4. In a *pulverized 'coal burning locomotive, a fire bei' an outlet in an upper forward portion thereof, means for delivering the coal into` said box in a forward direction adjacent the bottom thereof. siphon legs in i saidbox, water tubes in said box, together with an arch supported by said siphon legs and said tubes whereby the fuel and flame stream is caused'to contact serlallyfwith the lower portions of said legs. said tubes, the

upper sheet-like portions of said legs and then to pass to said outlet.

5. In a `pulverizcd coal burning locomo- "tive, a fire box havingan outlet in a forward portion thereof and means for deliverin'g the fuel into said box in :i lower rearward portion thereof. water tubes in firearwajrd -portion of said box, Siphon legs'extending forwardly of said tubes, other tubes between said legs and said outlet, together with an inverted V-sliaped arch supported vby said legs and said first mentioned tubes whereby the fuel and fiaine stream is caused to contact serially with the lower porti'ons of said legs, `said first mentioned tubes, the, upper portions of D said legsv and said last mentioned tubes... i f

In testimony whereof, I havenhereunto GeenenA W. eiQENDoN."

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